I have a Southbend S24E range/oven. The oven is used for plate warming during service. It is kept at around 200 degrees. Every night the oven will go out and needs relighting (Pushing the pilot knob and on from there). We made sure the wires are tight on the valve and replaced the thermopile. It still goes out. Would replacing the valve help resolve the issue? What else can we do to prevent this from happening?